Metro Richmond has a few blackbuck in their petting zoo area! Along with a fallow deer and the usual goats, donkey, zebu, etc
Chengdu Panda Research Base (or whatever the name is these days) has a huge red panda walkthrough exhibit. Once you get through the entrance, it feels like you're pretty much just walking on a wooden walkway through the forest. At the time I went, they were claiming the largest number of red pandas at any facility, and I can believe it. I also seem to remember a walkthrough area with flying squirrels in Singapore, but I can't remember if it was the regular zoo or night safari.
I'm far from an expert, but I was under the impression that yellow anacondas are a lot more docile and easy to take care of than green?
My reply was specifically about species in walk-through exhibits. IMO, one of them is a bad choice for that. The other is worse. Ordinary keeping or an ordinary closed exhibit is quite different than a walk-through exhibit. Sure they have individual 'personalities', but most yellows would stress out in that situation and even if they're smaller than greens they're still big strong snakes that can do some damage if a mistake happens.
Pairi Daiza in Belgium has an Egyptian fruit bat walk-through located in an old abbey crypt. Pairi Daiza also has a walk-through green house with two species of flying foxes and two species of squirrels.
A couple of Indian zoos have walk through pelican exhibits, but most were closed because the walk through tunnel was broken.
-Walk-through exhibits for Fallow deer, Pyrenean chamois and South-east Spanish ibex in Lacuniacha -I remember seeing photos of a place with a walk-through European bison exhibit
I can't remember the name but it's in The Netherlands, and also features walk-in/through Przewalski's horse and Pere David's deer enclosures as well. I know @snowleopard visited it early on during his European trip last year if that helps you find it.
The wisent/Przewalski's horse walkthrough is at Natuurpark Lelystad; there is a picture here courtesy of vogelcommando. Wisents - ZooChat Another interesting walkthrough I have seen on here, courtesy of a photo by Snowleopard, is a walkthrough with sitatunga at Mesker Park Zoo. Africa - Walk-Through Sitatunga/White Stork Exhibit - ZooChat And a third ungulate walkthrough, at Parc Animalier Des Pyrenees, which is home to roe deer, Pyrenean chamois, Alpine ibex, European mouflon, Barbary sheep and Cretan wild goat (picture courtesy of Maxime). Caprid walkthrough exhibit (6 species) - ZooChat
Goodness, I would have expected there to be health & safety concerns about walk-through Wisent, lovely as they are. I would love to see them living wild here in the UK, but don't know whether they were ever native.
Not sure if it has been mentioned yet but there is a walkthrough walrus exhibit in a Chinese zoo and Aquarium
Just saying.....don't walrus suck the brains out of seals, and maybe the occasional person? Or did I dream that up?
The Detroit Zoo has a butterfly garden in the summer and an Australian walk-through. There's an emu or two, several wallabies, and usually about sixteen or so kangaroos. It's nothing special but it's pleasant. Australian Outback Adventure Archives - Detroit Zoo